设函数y=y(x)由方程(x+y)^(1/x)=y所确定,则dy/dx=?
1个回答
ln(x+y)=x·lny
(1+y‘)/(x+y)=lny+x/y·y‘
y+y·y‘=y(x+y)lny+x(x+y)·y‘
y‘=【y(x+x)lny-y】/【y-x(x+y)】
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